US1658810A - Valve - Google Patents

Description

Feb. 14, 1928.

J. MACHTOLF VALV E Filed Feb. 18, 1927 Patented Feb. 14, 1928.-

' UNITED STATES PATENT. ori-"ICE,

rosal' imcirronr, or carinii, GERMANY, AssIGNon To 'THE imm can.. HosTiirANN- sriiINBi-inziscnn r'AnBENFABBIxENn. n. B. n., 0E cELLE, annum.

VALVE.

Application led February 18, i927, Serial No. y169,896, and in Germany Hai-ch 4, 1928.

/ My invention relates to improvements in valves, and more particularly in valves to be used in connection with receptacles in which suddenly exceedingly high pressure and high temperature are produced. Valves of this class are used for example` in connection with tubular receptacles in which acetylene gas ignited lfor being split into its components, hydrogen and carbon, the latter being in the form of soot. When igniting. a charge of acetylene gas the pressure produced within the receptacle will be more than 100 atmospheres, while the temperature rises for a few seconds as high as 3000o C. Therefore, if the valves are not absolutely tight, the gas is liable to escape through the minute passages formed between the valve body and its seat, and gradually to enlarge the said passages. Therefore, it is necessary to provide a valve which is absolutely tight, and with/this object in view my improved valve body is made in two sections disposed coaxially one behind the other on the valve stem and enclosing an elastic packing medium between the same, the said elastic packing medium being pressed against the wall of a cylindrical chamber enclosing the valve sections.

For the purpose of explaining the invention an example embodying the saine has ybeen illustrated inthe accompanyingl drawing, in which a longitudinal sectional elevation of the valve has been shown.

In describing the invention reference will be made to a valve which is used in connection with a rece tacle in which acetylene gas is ignited forbeing split into its components. A valve of this class is provided at both ends of a tubular receptacle for passing hydrogen into the same for ushing out the soot, and for connecting the receptacle with a blower or fan for removin the soot therefrom.

My improved va ve is mounted at both ends of a tubular receptacle 1 adapted to have the acetylene gas split therein, the gure of the drawing showing only one of the valves mounted at one end of the receptacle. As shown, a sleeve 2 formed with a ange 20 is fitted in the tubular receptacle 1, and it is ixed in position by screw-bolts 21. The axial bore of the said sleeve constitutes a cylindrical chamber having a conical shoulder 2 providing a valve seat. To the sleeve 2 a tubular member or casing 3 is secured in a suitable way, for example by means of screws (not shown), which member is promeans of screws 23, said cup vided with a tubular branch 3b and an inlet opening 3*. To the outer end of the member 3 a sleeve 16 having a flange 4 is secured, and in the said sleeve a bushing 8 formed at its inner end with a liange or collar 17 is rotatable, the said bushing being fixed in position by means of anut 8 screwing thereon and engaging the outer face of the sleeve 16. The bushing 17 provides a guide for a valve stem 11.', and it has an arm 9 secured thereto which 1s connected with a slide valve 10 adapted to close either the branch 3b or the inlet opening 3a. To the bushing 8 an arm 8ZL is fixed by means of which the arm 9 and slide valve 10 may be turned into position for closing the branch 3" or the inlet 3*. At the outer side of the said arm 8a a cup is screwed tothe bushing 8, and within the said cup there is a bushing 6 fixed in position by means of a nut 6', an anti-friction bearing 18 being preferably disposed between the bushing 6 and a liange 19 provided within the c up 5 and engaging the outer end of the bushing 8. To the inner end ofthe stem 11 one of the sections of the valve body is fixed, which section is in the form of a cylindrical head 11 closely fitting within the bore of the sleeve 2. Further, on the stem 11 the section 12 of the valve body is mounted, which is formed with a tapering face adapted for engagement with the valve seat 2', the said section being movable on the stem in axial direction, as has been indicated by a screw 12 screwing in the hub 22 of the valve disk l2 and engaging in a groove 23 made in the valve stem. Between the valve Sections 11 and 12 there is an Ielastic packin medium 13, preferably a disk of rubber. o the inn'er'end face of the section 11 of the valve body an outwardly flaring cu is secured by Being provided with holes 24 and blades 25, the said blades beginning at one side of the holes 24.

A similar valve is provided at the opposite end (.not shown) of the tubular receptacle 1. But in the said valve the slide 10 and the inlet 3* are omitted, the. tubular member -3 of the valve being provided only with the branch pipe 3".a i

When using my improved valve in connection with the receptacle l for splitting acetylene gas,-I proceed as follows: After the acetylene gas confined within the recepi tacle 1 has been split by explosion into soot and hydrogen, the cup 5 is slightly turned between the 'So that the c lindrical bore of the sleeve 2 is opened. l referably, the pressure within the receptacle 1 is first reduced by allowing the hydrogen to escape through a suitable valve not shown) into a pressure chamber, until t ere is a (pressure of about 8 atmospheres in the sai pressure chamber. There,- after, the` pressure within the receptacle'l is completely reduced, the residue of the hydrogen escaping into a container for collecting 'and separatimT the soot. From the said container the hydrogen is passed into a gasometer '(not shown), or it is allowed to escape into .the atmosphere. After both valves have been opened compressed hydrogen is admitted through the mlet 3", which ydrogen-is preferably taken from the said pressure receptacle into which the hydrogen 1s first dischar ed from the receptac e 1, the said hydrogen eing preferably admitted to the receptacle 1 by Jars, so that the soot deposited on the inner wall of the receptacle l 1s made loose and removed from the said receptacle. B'V the ilaring form ofthe cup 14 'and the inc ined blades 25 whirling move-v ment is imparted to the hydrogen gas and the mixture oigas and soot, whereby the receptacle 1 is thoroughly cleaned. After the soot has thus been removed from the inner wall of the receptacle, and the main portion thereof carried into the collecting chamber, the lever 8 is turned, thus moving the slide 10 into position away from the branch pipe 3* and for closing the inlet 3*.' As 1s known to those skilled in the art, the branch pipes 3'b of both valves are connected to a closed tubular circuit including a blower or fan, and the said fan is operated a few minutes, so that the soot is com letel removed from the receptacle 1,. and t e said rece tacle is effectively cooled.

ow the stem 11 is pulled outwardly thus pgssmg thesections 11 and 12 of the valve dy and the packing medium 25 confined same into the cylindrical bore of the sleeve ,2, the valve section 12 being placed o n its seat 2. N ow'the key 7 is again passed into the vslotmade therefor in the e stem 1 1, and the cap 5 is screwed outwardly on 1 th`e"bushing 8 for pulling the stem 11 outwardly, the said capacting on the bushing 6 and the key` 7. .'llhus athe stem il pu ls the section 11 of the valve body out; wardly and towards the section 12, the section 12being fixed in position by being placed on its seat 2'. Therefore, the acking ring 13 of rubber is pressed outwar y and into en gagement with the inner wall of the dsleeve 2', so that the valveuis tight even as against hi pressure.

/ t appears therefore, 'that by constructing the'valve body in two sections and enclosing a acking medium between the same, the said packing medium tightly closes the valve, so that upon explosion of the acetylene gas no hydrogen and soot have access into the bore of the sleeve 2, the said bore remaining perfectly ciean even in case of numerous successive explosions. An important feature of the invention resides in providing the sectionv 12 engagin the seat 2 at the outer side of the valve bo y, because thereby the pressure of the exploded gas acts on the section 11 thus increasing the pressure exerted oni the packing medium 13, which therefore keeps awa -the soot from the valve seat 2. Further, the figure shows that the section 11 of the valve body is thick as compared to the section l2. Therefore, the said section 1l has a high capacity for heat, so that the heat produced within the receptacle 1 is not transmitted to the 'rubber packing ring 13 and the Said ring is not spollt by heat.

JWhile in describing the invention reference has been made to a particular examdple embodying the same I wish it to be un erstood'that my invention is not limited to the construction shown in the drawing, andl that, various changes may be made in the eneral lirrangement of the apparatus and t e construction of its parts without departing from the invention.

`What I claim is:

-1. `A valve for high pressure receptacles, comprising' a valve casing formed with a cylindrical chamber and a valve seat, of a valve body made in two sections axially uyu movable relatively to each other and fitting i in said cylindrical chamber and spaced from veach other, the outer section looking from the side of the pressure receptacle being adapted to be placed on said seat, an elastic packing medium confined between said sections of the valve body and adapted to be pressed into tight engagement with said cylindrical wall by the mner section, and means for forcing said inner section towards said outer sectio 2. A valve for high pressure receptacles,

comprising a valve casing formed with a cylindrical chamber and a valve seat,'of a stem extending from said chamber outwardly, a valve bodymade in two sections fittingin said chamber and one fixed to the inner end of said stem and the other one axially movable on said stem in position for being placed on said seat, an elastic packing medium confinedl between said sections of the valve body and adapted to be pressed into tight engagement with said cylindrical wall by said section on the inner end of the stem and means for pulling said stem outwardly.

3. A valve for high pressure receptacles, comprisin a valve caslng formed with a cylindrica chamber and a valve seat, of a valve body made in two sections axially movable relatively to each other and tting in said cylindrical chamber and spaced from cach other, the outer section looking from the side of the pressure receptacle being adapted to be placed on said seat, an elastic packing medium confined between said sections of the valve body and adapted to be pressed into tight engagement with said cylindrical wall by the inner section, means for forcing said inner section towards said cuter section, and a cup having a flaring wall fixed to the inner section, said valve casing having an inlet passage for fluid adapted to be forced through said cylindrical chamber and past said cup when said valve body is moved out of said cylindrical chamber.

4. A valve for high pressure receptacles, comprising a valve casing formed with a cylindrical chamber and a valve seat, of a valve body made in two sections axially movable relatively to each other and fitting in said cylindrical chamber and spaced from each other, the outer section looking from the side of thev pressure receptacle being adapted to be placed on said seat, an elastic packing .medium conned between said sections or the valve body and adapted to be pressed into tight engagement with said cylindrical wall by the inner section, means for forcing said inner'section towards said outer section, and a cup having a tlarin wall lixed to the 'inner section and form with holes and blades for the passage of a fluid, said casing having a passage for supplying a Huid past the valve and through said cup when said valve body is moved out of said cylindrical chamber.

5. A valve for high pressure receptacles, comprising a valve casing formed with a cylindrical chamber and a valve seat and having a cylindrical extension formed with an inlet and anA outlet, oi a valve body for controllin the opening and closing of the passage through said cylindrical chamber made in two sections axially movable relatively to each other and fitting in said cylindrical chamber and spaced from each other the outer section looking from the side o the pressure receptacle being adapted to be placed on said seat, an elastic packing medium confined between said sections of Vthe valve body and adapted to be pressed into tight engagement with the cylindrical wall by the inner section, means for forcing said inner section towards said outer section, and

a valve controlling said inlet and outlet.

6. A valve for high pressure receptacles, comprising a valve casing formed with a cylindrical chamber, a valve seat and a cylindrical extension having an inlet and an outlet, of a valve bod for controlling the opening and closing ot the passage through said cylindrical chamber made in two sections axlally movable relatively to each other and fitting in said cylindrical chamber and spaced from 4each other, a stem for said valve body, the outer section looking'from the side of the pressure receptacle being adapted to be placed on said seat, anelastic packing medium confined between said sections of the valve body and adapted to be pressed into tight engagement with the cylindrical wall by the inner section, a bushing rotatable in said extension and traversed by said stem, a slide valve connected with said bushingpand controlling said inlet and outlet, and means for pulling said stem outwardly.

In testimony 'whereof I have affixed my signature.

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